Vortex 491AZR-45 Aluminum 45-Tooth 520-Pitch Rear Sprocket

The Vortex 491AZR-45 is a 45-tooth, 520-pitch aluminum rear sprocket designed for high-performance motorcycle applications. Machined from lightweight aluminum billet, this sprocket delivers an excellent strength-to-weight ratio over stock steel units, reducing unsprung rotational mass for improved throttle response and acceleration.

Key Features:

• 45-Tooth, 520-Pitch: Standard 520 chain pitch compatible with a wide range of sport and street motorcycles
• CNC Machined Aluminum: 100% CNC machined from high-grade aluminum billet for precise tolerances and consistent fit
• Patented Saber Tooth Groove Design: Vortex's unique tooth profile reduces chain wear and extends sprocket longevity compared to conventional designs
• Lightweight Construction: Significantly lighter than OEM steel sprockets, reducing rotational mass for crisper throttle response
• Anodized Finish: Durable anodized finish provides corrosion resistance and long-lasting appearance
• Bolt-On Installation: Direct OEM replacement fitment — no modifications required

The Vortex 491AZR-45 rear sprocket is an ideal upgrade for riders looking to optimize their motorcycle's power delivery and reduce drivetrain weight. Part of Vortex's trusted 491 series rear sprocket lineup, this sprocket is built to racing-level standards for street and track use.